04 2.7 timing - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
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post #1 of 5 (permalink) Old 04-20-2017, 06:26 PM Thread Starter
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04 2.7 timing

First off, I know this topic has been covered and discussed countless times and for lack of finding a relevant post to my question i apologize in advance. A little back story about my issue since I can't seem to find my previous threads, I initially started off with a water pump change. Suppose to be easy enough, right? Well go figure I didn't check my timing correctly before reassembling and long story short I bent EVERY SINGLE VALVE. yay me! Lol well since then I tore down, purchased all appropriate parts, had valves professionally reseated and heads resurfaced. To prevent myself from making this mistake again (and wanting to shred this car to a million pieces due to my own incompetence) I am attempting to edgimicate myself on the timing and reassembly. (Spelling intentional) This may seem like a dumb question but I need to be sure I understand this before I cost myself another 400$. I will most likely have more questions but well start off with this one, how does one determine exhaust and compression stroke with the heads removed? I believe daytrepper And peva were helping me before and I greatly appreciate any help anyone can provide!!
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post #2 of 5 (permalink) Old 04-20-2017, 07:18 PM
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Strange that only this thread comes up when searching for all of your posts by clicking on your posting name and selecting "Find More Posts by The Alaskan" or by viewing your profile (shows total of one post). Have you re-registered with a new posting name?

To answer your question, the terms exhaust and compression strokes are meaningless with the valves not installed. The timing of the opening and closing of the valves with respect to the pistons 100% determines which stroke the engine is in.

It may help to keep in mind that with the crankshaft rotated to point the crank sprocket mark at the mark on the oil pump, you can install the cams at any rotation angle, and then rotate them all you want to to get them in the proper positions for correct chain timing because all 6 pistons are enough of a distance below TDC (1 & 4 at at 60 ATDC, 2 & 5 are at BDC, and 3 & 6 are at 60 BTDC) to prevent contact with any valve in the fully opened position.

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post #3 of 5 (permalink) Old 05-10-2017, 01:09 PM Thread Starter
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Like I said dumb question. Lol that's exactly what I thought but must have been misunderstanding the book. Thankyou peva I appreciate your knowledge. As for the profile I'm fairly certain this is my original profile so idk what happened to my other posts....between work and ordering parts I haven't had a chance to post a reply lately. I actually had a cam cap break on me! Couldn't believe it and thought I was screwed but I was able to find another. Apparently those are more fragile than I expected. Torqing to spec and the thing snapped!! Anyway now that that's fixed and I'm at a point of waiting for my injectors to come in the mail I would like to get to the timing. The pictures I'm posting are of the passenger and drivers side cams in their current position. From what I understand this is not the position they will need to be in when I attach the primary chain with the crank sprocket lined up with the oil pump timing mark and the links on the primary chain in their proper position. From what I understand the passenger side cams will be at 12 o'clock and the drivers side will be at 2 o'clock with timing marks on primary lined up with oil pump timing mark. Is this correct?
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post #4 of 5 (permalink) Old 05-10-2017, 09:01 PM
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Go by the 2nd FSM sketch in post no. 4 here: Crankshaft Sprocket and Timing - 2.7L

Notice the direction that the slots in the ends of the camshafts are pointing in and that a line going through the two bolt holes on the intake camshafts are exactly parallel to the planes of the valve cover joining surfaces.
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post #5 of 5 (permalink) Old 05-10-2017, 09:16 PM
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Bill knows 2.7L timing!
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